linux-kernel - Re: [PATCH] Re: Regression: VIDIOCGMBUF ioctl hangs on bttv driver (2.6.24-rc6)

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Message-ID: <20080106151730.GA17789@elte.hu>
Date:	Sun, 6 Jan 2008 16:17:30 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Gregor Jasny <jasny@...soft.de>
Cc:	linux-kernel@...r.kernel.org,
	video4linux-list <video4linux-list@...hat.com>,
	Mauro Carvalho Chehab <mchehab@...radead.org>,
	v4l-dvb-maintainer@...uxtv.org, "Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [PATCH] Re: Regression: VIDIOCGMBUF ioctl hangs on bttv driver
	(2.6.24-rc6)


* Gregor Jasny <jasny@...soft.de> wrote:

> From: Gregor Jasny <gjasny@....de>
> 
> Fix bttv VIDIOCGMBUF locking like done in commit
> 820eacd84cff23b76693f4be1e28feb672f4488f. 

i've double-checked that there are no other video drivers affected by 
this problem:

 $ cd drivers/media/
 $ grep -C 10 videobuf_mmap_setup `grep -l mutex_lock */*.c */*/*.c */*/*/*.c`

 video/videobuf-core.c-  mutex_lock(&q->lock);
 video/videobuf-core.c-  mutex_lock(&q->lock);
 video/bt8xx/bttv-driver.c-              mutex_lock(&fh->cap.lock);

so only bttv-driver.c was affected, at first sight.

	Ingo
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